Abstract
It is commonly accepted that X-ray lasers, as the devices based on amplified spontaneous emission (ASE), did not show any specific polarization in the output beam. The theoretical analysis within the uniform (single-mode) approximation suggested that the output radiation should show some defined polarization feature, but randomly changing from shot-to-shot. This hypothesis has been verified by experiment using traditional double-pulse scheme of transient inversion. Membrane beam-splitter was used as a polarization selector. It was found that the output radiation has a significant component of p-polarisation in each shot. To explain the effect and place it in the line with available, but scarce data, propagation and kinetic effects in the non-uniform plasma have been analysed.
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Acknowledgements
HS acknowledges support by the BMBF German-Korean Collaboration Program (No. KOR 10/016) and by Japanese Atomic Energy Agency. The project was also supported by the Ministry of Education, Science and Technology of Korea through Basic Science Research Program (No. R15-2008-006-03001-0), the Korea-Germany collaboration program of Korean National Research Foundation (No. 2010-00633) and by Gwangju Institute of Science and Technology through a grant from the DASAN fund and the Photonics 2020 project. CMK was supported by the Institute of Basic Science.
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Janulewicz, K. et al. (2016). Output Beam Polarisation of X-ray Lasers with Transient Inversion. In: Rocca, J., Menoni, C., Marconi, M. (eds) X-Ray Lasers 2014. Springer Proceedings in Physics, vol 169. Springer, Cham. https://doi.org/10.1007/978-3-319-19521-6_8
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DOI: https://doi.org/10.1007/978-3-319-19521-6_8
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